On the "Comics Should Be Good" blog they run a regular feature entitled "The Line It Is Drawn" where blog contributors along with regular readers suggest a mash-up within a stated theme to be drawn by one of the feature's regular artist contributors. The most recent theme being "cover homages" [link]

One of the suggestions was for an homage of a particular Flash cover [link] done with Spider-Man instead. I thought it was such a great idea that I had to do my own take on it.